Novel Molecular Tracers for Prostate Imaging
Ismail Baris Turkbey, MD, Senior Clinician, Molecular Imaging Branch (MIB), National Cancer Institute (NCI), National Institutes for Health (NIH) discusses novel molecular tracers for prostate imaging. Dr. Turkbey begins by listing and describing various molecular tracers used with positron emission tomography (PET) imaging of the prostate, including tracers used historically, explaining what each targets (e.g. glucose, cell membrane synthesis). Dr. Turkbey summarizes past trials of various tracers that fell short of prostate-specific membrane antigen (PSMA) in identifying localized disease.
He calls the last few years “exciting” in terms of developments in molecular imaging and several PET tracers targeting PSMA. Dr. Turkbey outlines 68Ga-PSMA-11, 18F-DCFPYL, and 18F-rhPSMA-7.3 and illustrates their use with patient case examples whereby these PSMA tracers helped identify local disease and guide focal therapies. He lists the various tracers available and explains that each has advantages and disadvantages and it depends on the biology to be profiled. Dr. Turkbey reiterates that the strongest evidence for identifying and staging localized disease is PSMA PET CT scans which are now available.
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